Brush holder



.l. L. CHANTEMERLE.

BRUSH HOLDER. APPLICATION FILED MAR-151MB.

1,435,209; PdtentedNov. 14,1922.

WITNESSES: ENVENTOR v ATTORNEY Patented Nov. 14, 1922.

UNITED STATES PATENT OFFICE.

JOSEPH L. CHANTEMERLE, OF TURTLE CREEK, PENNSYLVANIA, ASSIGNOR TO WEST- INGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVANIA.

BRUSH HOLDER.

T 0 (all whom it may comm'rn:

Be it known that I, Josnrrr L. CHANTE- Mnnnn, a citizen of the United States, and a resident of Turtle Creek, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Brush Holders, of which the following is a s )ecification.

Aly invention relates to dynamo-electric machines, and it has particular relations to brush holders adapted for use thereon.

One object of my invention is to provide a brush holder which may be conveniently and inexpensively manufactured from a single piece of sheet metal and which shall be strong and durable in operation.

Another'object of my invention is to provide a means for mounting the pressureproducing spring by which it shall be firm- 1y held in position during operation of the machine and from which it may easily be removed and replaced without removing the brush holder from the machine.

The structure of this application is an improvement upon the structure shown in Patent 1,168,021, granted to C. B. Mills on January 11, 1916.

Heretofore. as shown in the patent to Mills, sheet-steel brush holders have been formed of two pieces of metal so bent that one U-shaped piece fits Within another of similar contour to constitute the brush box. Also the spring is held, by projections from the sheet-metal parts, in such manner that the brush holder must be removed from the machine in order to replace a broken or defective spring. In my structure, these two disadvantages are overcome and approximately a 50% saving in material is effected.

Referring to the accompanying drawing, Fig. 1 is a view, artially in elevation and partially in section, of a portion of a dynamo-electric machine equipped with a brush-holder constructed in accordance with my invention; and Fi 2 is a detail perspective view of the brus -holder.

Referring more particularly to the drawings, I have shown a dynamo-electric machine 1 comprising a stator 2 and a rotor 3 which is mounted upon a shaft 4, one bearing of which is supported by an end-bracket 5. The rotor 3 is provided with a commutator cylinder 6 upon which brushes 7, that are mounted in a brush-holder 8, are

adapted to beer.

The brush-holder 8 consists of a single piece of sheet metal, one portion 10 of which is bent to substantially U-shaped inorder to receive the brush 7 and another portion of which comprises The brush 7 is enclosed on three sides by the U-shaped portion 10 of the brush holder 8 and on the fourth side by the support 9 to which the brush holder is attached. The support 9 may be a metallic support for use in alternating-current machines or it may be composed of insulating material 'for use in direct-current machines. Also, in alternating-current machines, the brush boxes may be attached directly to the end bracket 5. An electrical connection is established between the brush 7 and a terminal 15 by means of a flexible connection 16, so that the member support ing the brush box need not be of conducting material.

From the foregoing description, it will be understood that the spring may easily be disconnected from the brush holder 8 without detaching it from its support and that the spring will be securely held thereby at all times. It will also be apparent that my brush-holder is of novel design in that it employs the supporting base 9, which may be a. separate member or a portion of the end bracket 5, as a portion of the brush box. Since, by the use of my invention, it is unnecessary to remove the brush holder from its support unless the brush-holder itself becomes broken, which rarely happens, it may be fastened to its support by rivets, as shown at 17. This eliminates the possibility of the brush working loose and moving so as to form a poor contact with its coacting bearing surface or becoming disengaged and getting between rotating and stationary parts, thus causing". damage to the machine.

While I have shown my invention in its preferred form it will be obvious to those skilled. in the art that it is not so limited but is susceptible of various minor changes and modifications Within the scope of the appended claims.

I claim as my invention 1. In a brush-holder, a spring adapted.

to exert pressure upon the brush and holding means for said spring comprising two spaced members on one side of said spring and a third member disposed on the opposite side thereof and adapted to exert pressure thereuponat apoint intermediate said two spaced members.

2. In a brush holder, a spring adaptedto exert pressure upon the brush and holding means for said spring' comprisin p; two

and holding means for said spring. comprising three spaced projections integral with said brush holder but extendingat right anglesthereto', two of said projectionshaving' notches in} one side adapted. to receive said spring and the third member being adapted to hold said spring in said notches.

4. In a one-piece brush holder, a spring adapted to exert pressure upon the brush and mounting means for said spring comprising two juxtaposed members having; notches disposed. in: side-by side relation on one side of said spring, and a. third member disposed on the opposite side of the spring: to hold it said notches.

In a one-piece brush holder, two juxtaposed members in side-by-side relation ha ing notches in one side. a spring adapted to exert pressure on the brush and having one end disposed in said notches. and a member for holding said spring end in said notches.

6. In a one-piece brush holder, two juxtaposed members in side-by-side relation ham ing notches in one side, a spring adapted to exert pressure on the brush and having one end disposed in said notches, and member adapted to exert pressure on said spring at a point intermediate said two juxtaposed members. I I

In testimony whereof, I have hereunto subscribed my name this 7th day of'March, 1918. i

JOSEPH L. CHANTEMER-LE. 

